The height of the equilateral triangle below is 15 units. What is the value of x?

Step-by-step explanation:

The height of the equilateral triangle below is 15 units

Let x is the side of the equilateral triangle

Equilateral triangle is divided into to two special right triangles 30-60-90 degree triangles

Height is 15 units

Hypotenuse is x

use the general ratio of  30-60-90

compare the sides and find out hypotenuse x

now replace the value of 'a' for x=2a

this is not the answer this is just a question. is this middle school math?

step-by-step explanation:

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb